JP2010142430A - Furniture with top plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress fatigue of user's arms and wrists when performing a keyboard operation for a long period of time. <P>SOLUTION: A part of the top plate surface 3a of the first top plate 3 of a desk D is formed as a keyboard arranging area 3d which is inclined downwards to a non-using end side 3c and is used for placing a keyboard, and the wrists are prevented from being bent upwards by placing the keyboard on the keyboard arranging area 3d. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to furniture with a top plate that is suitably used for work using an information terminal such as a personal computer and bookkeeping work on paper documents in an office or the like.

Conventionally, as a furniture with a top plate that can be suitably used by those who work with information terminals such as personal computers in offices, etc., a cradle for placing the keyboard of the information terminal on the top plate, and this cradle A support mechanism that slidably supports along the lower surface of the top plate between the storage position stored below the top plate and the use position drawn from the storage position to the use end side of the top plate while maintaining a substantially horizontal posture. And a push-up mechanism that maintains the keyboard placed on the cradle in a substantially horizontal position at the storage position and pushes the rear end of the keyboard up to a forward tilt position at the use position. (For example, see Patent Document 1).
Japanese Patent No. 3371872

  By the way, when operating the keyboard arranged on the top plate of such furniture with a top plate, the user places the wrist in front of the keyboard, folds the wrist upward and touches the keyboard. Will do. When the keyboard is operated in such a posture for a long time, a problem that the user feels tired on the arm or wrist may occur.

  The present invention aims to solve such problems.

  That is, in order to solve the above problems, the furniture with a top plate according to the present invention has a slope in which part or all of the top plate surface is lowered toward the counter-use end side, and a keyboard is placed thereon. It is at least possible to use the keyboard arrangement area.

  In such a case, when the keyboard is arranged in the keyboard arrangement area, the keyboard arrangement area has a slope that descends toward the opposite end, so that it is necessary to fold the wrist upward when performing keyboard operation. Disappears. Note that “at least possible to be a keyboard layout area” means not only that the corresponding area has a state in which the corresponding area is always inclined downward toward the counter-use end side, but also the corresponding area is the counter-use end. It is a concept including what can be changed to a state having an inclination that descends toward the side.

  In order to more effectively suppress the upward folding of the wrist when the keyboard is operated, the keyboard placement area and the ceiling are arranged so that the keyboard placement area is positioned below the other areas of the top plate surface. What provided the level | step difference between the other area | regions of a board surface is desirable. If this is the case, the height position of the upper surface of the keyboard when the keyboard is placed on the keyboard placement area is the height position of the upper surface when the keyboard is placed on another area of the top plate surface. This is because it is lower than the step.

  When performing a mouse operation in addition to the keyboard operation, in order to stably place the mouse on the top board, a part of the top board is used as the keyboard arrangement area, It is desirable to provide a mouse arrangement area with a gentler slope than the keyboard arrangement area on the side of the keyboard arrangement area. In such a case, if the mouse is placed in the mouse placement area, it is difficult for the mouse to slide down from the top board.

  In order to further reduce the fatigue of the user's arm, the arm support has a gentler slope than that of the keyboard placement area and can be placed on the front of the both sides of the keyboard placement area. What has provided the area | region protruded ahead is desirable. This is because the user's arm can be placed on the arm support area even when used with a chair without an armrest. Furthermore, when a user with short arms uses the furniture with a top board, the user's torso can be arranged at a position between the arm support areas, and the keyboard can be operated without extending the arms.

  In order to be able to select a usage mode according to the user's preference, it is desirable that the inclination of the keyboard layout area can be changed.

  Furthermore, in order to be able to comfortably perform both work using an information terminal such as a personal computer and writing work on a paper document using such furniture with a top plate, the first keyboard having the keyboard arrangement area is provided. And a second top plate disposed above the first top plate, and a part or the whole of the second top plate is a recording area in which the counter-use end side is inclined upward. Is desirable. If this is the case, when writing on the opposite side of the paper document, the head and neck will be tilted forward compared to writing on a document on a conventional horizontal top plate. This is because it is not necessary to greatly extend the arm. Moreover, even if it is possible at least to make a part or all of the top plate surface into a bookkeeping area having an inclination rising toward the counter-use end, the same effect can be obtained.

  In order to be able to select a usage mode according to the user's preference, it is desirable that the inclination of the bookkeeping area can be changed.

  According to the configuration of the furniture with a top plate according to the present invention, at least part of the top plate can be a keyboard placement region having a slope that descends toward the counter-use end side. When the keyboard arranged in the keyboard arrangement area is operated, it is not necessary to fold the wrist upward. Therefore, it is possible to suppress the occurrence of the problem that the user feels tired on the arm or wrist.

  Hereinafter, an embodiment of the present invention will be described.

  As shown in FIGS. 1 to 8, the desk D, which is a furniture with a top plate according to the present embodiment, has a leg 1 that stands up from the floor and a top plate support structure 2 that is supported by the leg 1. A first top plate 3 supported by the top plate support structure 2 and a first top plate 3 disposed above the first top plate 3 and supported by the top plate support structure 2 in the same manner. 2 and a top plate moving mechanism 5 for moving these first and second top plates 3 and 4 in the front-rear direction. Further, the desk D includes a support portion 61 attached to the top plate support structure 2 and an arm main body 62 having one end portion supported by the support portion 61 so that the position in the height direction can be changed. A display arm 6 can be attached.

  Specifically, as shown in FIGS. 1 to 4, the legs 1 are provided in a pair of left and right, a base 11 extending in the front-rear direction, and an extendable leg strut 12 standing from the base 11. And a driving device 13 for driving the leg struts 12. The leg strut 12 has a hollow fixed leg element 12a standing up from the base 11, and a movable leg element 12b which is telescopically fitted to the fixed leg element 12a and movable in the vertical direction. The driving device 13 is attached to the movable leg element 12b, and the movable leg element 12b moves up and down while changing the degree of fitting with respect to the fixed leg element 12a by receiving a driving force from the driving device 13. . The top support structure 2 is attached to the upper end of the movable leg element 12b.

  As shown in FIGS. 1 to 3, 7, and 8, the top plate support structure 2 is provided at the upper end of the leg 1, more specifically, at the upper end of the movable leg element 12 b. A side frame 21 to be attached and a back frame 22 for connecting the rear ends of the side frames 21 are provided. The side frame 21 includes a side frame main body 21a attached above the outer side of the elevating leg 1, a first top plate support portion 21b provided inside the side frame main body 21a, and the side frame. And a second top plate support portion 21c provided above the outer end portion of the main body 21a. In FIG. 7, the second top plate support portion 21c is omitted. A first slide rail 21b1 is provided on the inner surface of the first top plate support portion 21b. The first slide rail 21b1 includes an outer rail (not shown) attached to the side frame 21, an intermediate rail 21b3 that can be moved back and forth while being guided by the outer rail, and a front and rear motion that is further guided by the intermediate rail 21b3. The inner rail 21b4 is attached to the first top plate 3, and the first top plate 3 is supported by the inner rail 21b4 so as to be movable in the front-rear direction. A second slide rail 21c1 is provided on the inner surface of the second top plate support portion 21c. Although not shown, the second slide rail 21c1 also has an outer rail attached to the side frame 21, an intermediate rail that can be moved back and forth while being guided by the outer rail, and a front and rear that is further guided by the intermediate rail. The second top plate 4 is supported by the inner rail so that the second top plate 4 can move in the front-rear direction. That is, the first and second top plates 3 and 4 are supported so as to be movable in the front-rear direction via first and second slide rails 21b1 and 21c1 provided on the side frame 21, respectively. The first and second slide rails 21b1 and 21c1 are provided with a moderation mechanism (not shown) so that the first and second top plates 3 and 4 can be held at the use positions U, respectively.

  As shown in FIG. 1, FIG. 2, FIG. 4, FIG. 5, FIG. 7, and FIG. 8, the first top plate 3 is interposed via the first slide rail 21b1 of the top plate support structure 2. , And is supported so as to be movable between the use position U and the storage position S behind the use position U. A keyboard can be arranged on the top surface 3 a of the first top plate 3. More specifically, a keyboard is placed on the portion near the counter-use edge 3c in the center of the width direction of the first top plate 3 and having a slope that descends toward the counter-use edge 3c. A possible keyboard arrangement area 3d is formed. The depth dimension of the keyboard arrangement area 3d is made to substantially correspond to the depth dimension of a standard desktop personal computer keyboard. In this embodiment, the inclination of the keyboard arrangement area 3d is set to 10 degrees. On the other hand, the width dimension of the keyboard layout area 3d is larger than the width dimension of a standard desktop personal computer keyboard, and the keyboard width direction position can be changed in the keyboard layout area 3d. The keyboard placement area 3 d of the top surface 3 a is located below the other areas of the top surface 3 a of the first top 3. That is, a step is provided between the keyboard placement area 3d and the other area of the top surface 3a, and the height position of the upper surface of the keyboard when the keyboard is placed on the keyboard placement area 3d is determined. The height of the upper surface in the case where the keyboard is placed on the other area of the top plate surface 3a is lowered by the step. On the other hand, on the left and right sides of the keyboard arrangement area 3d on the top plate surface 3a, a mouse arrangement area 3e having a gentler slope than the keyboard arrangement area 3d is provided. Further, an arm support area 3f, which has a gentler slope than the keyboard arrangement area 3d and on which a user's arm can be placed, protrudes forward in front of both end portions of the keyboard arrangement area 3d. Provided. In the present embodiment, the inclination of the top plate surface 3a other than the keyboard arrangement region 3d of the top plate 3 is set to 3 degrees. A portion between the left and right arm support regions 3f is a recess 3g that can accommodate the user's torso. In addition, the height position from the floor surface of this 1st top plate 3 can be changed in the range of 450 mm-750 mm by extending the said leg support | pillar 12 and raising / lowering the said top plate support structure 2. As shown in FIG. . In addition, the lower limit 480 mm of the height position from the floor surface of the first top plate 3 is a height position at which a person with a physique corresponding to 5% from the shortest height among Japanese adult women can comfortably operate the keyboard. It was determined by experiment. On the other hand, the lower limit 745 mm of the height position from the floor of the first top plate 3 is a height position where a person with a physique equivalent to 5% of the tallest Japanese adult male can comfortably operate the keyboard. It was determined by experiment. Further, the depth dimension of the arm support area 3f is determined by experiments as a dimension that allows a person with a physique equivalent to 5% from the tallest of Japanese adult males to place most of the arms when performing keyboard operations. is there. On the other hand, the depth dimension of the recess 3g is determined by experiments as a dimension that allows a person with a physique equivalent to 5% from the shortest of Japanese adult women to operate the keyboard with the body placed in the recess 3g. It is a thing. The second top plate 4 is provided above the first top plate 3.

  As shown in FIGS. 1, 2, 4, and 6 to 8, the second top plate 4 is moved to the use position U via the second slide rail 21 c 1 of the top plate support structure 2. And a storage position S behind the use position U are supported so as to be movable. Moreover, it is possible to perform a writing operation on the top surface 3 a of the second top plate 4. More specifically, the second top plate 4 is supported by a substantially horizontal plate-shaped top plate main body 41 and a shaft extending in the width direction at a predetermined position of the top plate main body 41, and the free end side thereof is movable up and down. Writing table 42 and a writing table lifting link mechanism as a writing table lifting device provided between the top plate body 41 and the writing table 42 so that the vertical position on the free end side of the writing table 42 can be changed. 43. In the present embodiment, the upper surface of the writing table 42 is used as a writing area 42a, and an operation is applied to the writing table lifting / lowering link mechanism 43 so that the writing area 42a is moved from the use edge 4b side to the counter-use edge 4c side. It is possible to provide a slope that rises towards The height position of the second top plate 4 from the floor surface can be changed by extending and lowering the top support structure 2 by extending and contracting the leg columns 12. At this time, the height position of the second top plate 4 with respect to the first top plate 3 is maintained. The writing table lift link mechanism 43 includes an operation lever 43a extending in the depth direction of the second top plate 4 with the operation end 43a1 facing the use edge 4b of the second top plate 4, and the operation lever. A first link member 43b having one end connected to the other end of 43a, a second link member 43c having one end connected to the vicinity of the counter-use edge 4c of the second top plate 4, The other end portions of the first and second link members 43b and 43c are rotatably connected and engaged with a stopper member 42b provided on the lower surface of the writing table 42 on the side opposite to the use edge 4c. And a support shaft member 43d for supporting the base 42. Here, in the present embodiment, the stopper member 42b has a recess formed by engaging the support shaft member at a position where the inclination of the writing area 42a is 5 degrees, 10 degrees, and 15 degrees. The operating lever 43a is guided in the moving direction by a guide member 43e. The second top plate 4 is connected to the first top plate 3 via the top plate moving mechanism 5 and moves back and forth in a reciprocal manner with respect to the first top plate 3.

  As shown in FIGS. 1, 2, 7, and 8, the top plate moving mechanism 5 includes a first rack gear 51 provided on the first top plate 3, and the first rack gear 51 in the present embodiment. A second rack gear 52 provided on the second top plate 4 and a pinion gear 53 that meshes with the first and second rack gears 51 and 52 simultaneously. More specifically, the first rack gear 51 is attached to the lower surface of the first top plate 3 in a pair on the left and right sides, and rack teeth are formed on the lower surface. The second rack gear 52 is attached to the lower surface of the second top plate 4 as a pair on the left and right sides, and rack teeth are formed on the lower surface. The second rack gear is provided outward from the first rack gear. The pinion gear 53 includes a first gear body 53 a that meshes with the first rack gear 51, and a second gear body 53 b that meshes with the first gear body 53 a and the second rack gear 52. The first gear body 53a has a tooth width larger than that of the second gear body 53b. The first rack gear 51 and the second gear body 53b are disposed adjacent to each other in the tooth width direction, and the first rack gear 51 and the second gear body 53b are disposed in the first gear. The body 53a is simultaneously meshed so that they can be moved synchronously.

  On the other hand, as described above, the display arm 6 includes the support portion 61 attached to the top plate support structure 2 and the height direction of the support portion 61 as shown in FIGS. It has an arm body 62 that supports one end so that the position can be changed and supports the display monitor only in the front-rear direction at the other end.

  The support portion 61 includes an attachment portion 61a that is connected to the top plate support portion 61, and a support column 61b that stands upward from the attachment portion.

  The arm body 62 includes a supported portion 62a attached to the support 61a, first and second link mechanisms 62b and 62c connected to the front of the supported portion 62a, and the first and second link mechanisms 62b and 62c. A monitor attachment portion 62d that is supported by the second link mechanisms 62b and 62c and can be attached to the front is provided.

  The first link mechanism 62b rotates around a first link member 62b1 supported by the support portion 61 and a first shaft 62b5 extending in the vertical direction to the left and right of the first link member 62b1. The left and right second link members 62b2 having one end supported as possible, and the second shaft 62b6 extending in the vertical direction on the other end side of the second link member 62b2 are supported so as to be rotatable. The left and right third link members 62b3 and the third shaft 62b7 extending at both ends in the vertical direction to the other end sides of the respective third link members 62b3 are rotatably supported. And a fourth link member 62b4 that supports the monitor. Here, in the present embodiment, the first link member 62b1 and the third link member 62b3 are formed using a set of rod-shaped members provided in a pair in the vertical direction. On the other hand, the second link member 62b2 and the fourth link member 62b4 are formed using one bar-like member, and can enter between upper and lower bar-like members of adjacent link members. .

  On the other hand, the second link mechanism 62c is supported by a first link member 62b1 of the first link mechanism 62b via a fourth shaft (not shown) that extends in the horizontal direction. And a sixth shaft 62c3 that is supported by the fourth link member 62b4 via a fifth shaft (not shown) that extends in the horizontal direction and that extends in the horizontal direction to the fifth link member 62c1. And a sixth link member 62c2. Here, the fifth and sixth link members 62c1 and 62c2 are formed using plate-like members.

  The operation of each part of the desk D will be described below.

  When the keyboard operation is finished and the writing operation is performed, each part of the top board moving mechanism 5 operates as follows. When the operation of pushing the first top plate 3 from the use position U to the storage position S is performed, the first gear body 53a of the pinion gear 53 from the first rack gear 51 provided on the lower surface of the first top plate 3 is performed. The driving force is transmitted to the first gear body 53a and the second gear body 53b of the pinion gear 53 rotates in synchronization with the first gear body 53a. Then, a rotational force is transmitted from the second gear body 53b to the second rack gear 52 provided on the lower surface of the second top plate 4, and this rotational force drives the second top plate 4 to the use position U side. Is converted into driving force. On the other hand, when the operation of pulling out the second top plate 4 from the storage position S to the use position U is performed, the second top gear 4 of the pinion gear 53 is connected via the second rack gear 52 provided on the lower surface of the second top plate 4. The driving force is transmitted to the gear body 53b to rotate the second gear body 53b, and the first gear body 53a of the pinion gear 53 rotates in synchronization with the second gear body 53b. Then, a rotational force is transmitted from the first gear body 53a to the first rack gear 51 provided on the lower surface of the first top plate 3, and this rotational force drives the first top plate 3 to the storage position S side. Is converted into driving force. On the other hand, when the writing operation is finished and the keyboard is operated, an operation of pushing the second top 4 from the use position U to the storage position S or an operation of pulling the first top 3 from the storage position S to the use position U is performed. When performed, each part of the top plate moving mechanism 5 operates in the direction opposite to the above-described operation.

  Further, when an operating force is applied to the operation end 43a1 of the operation lever 43a of the writing table lifting link mechanism 43, one end portion of the first link member 43b of the writing table lifting link mechanism 43 is driven by the operation lever, Since the distance from the one end portion of the second link member 43c changes, the support shaft member 43d connected to the other end portions of the first and second link members 43b and 43c changes the position in the depth direction. It moves up and down while in contact with the stopper member 42b. Then, after setting the inclination angle of the writing table 42 to a desired inclination angle of 5 degrees, 10 degrees, and 15 degrees, when the operation is canceled, the concave portion of the stopper member 42b of the writing table 42 and the support shaft member 43d are engaged. The writing table 42 is held in a state where it rises by a desired angle toward the counter-use edge 3c. Further, when the operation is canceled in a state where the writing area 42a set on the upper surface of the writing table 42 is flush with the top board surface 4a of the other area of the second top board 4, that is, the inclination is 0 degree. The writing table 42 is supported by the top plate body 41, and the state where the inclination is 0 degree is maintained.

  On the other hand, when an operation force directed in the front-rear direction is applied to the display monitor or the monitor mounting portion 62d, the first link mechanism 62b operates as follows. First, the fourth link member 62b4 connected to the monitor mounting portion 62d is moved and moved in the front-rear direction. This operating force is transmitted from the fourth link member 62b4 to the third link member 62b3, from the third link member 62b3 to the second link member 62b2, and from the second link member 62b2 to the first link. The information is sequentially transmitted to the member 62b1. On the other hand, since the first link member 62b1 is fixed to the support portion 61, the second shaft 62b6 connecting the second and third link members 62b3 is connected to the fourth link member 62b4 and the first link member 62b4. In response to the change in the distance to the link member 62b1, it moves to the side. The second link mechanism 62c operates as follows. That is, the lower ends of the fifth and sixth link members 62c1 and 62c2 of the second link mechanism 62c approach each other, and the sixth shaft 62c3 moves in the vertical direction.

  On the other hand, when an operation force directed in the left-right direction is applied to the display monitor or monitor mounting portion 62d, each component of the second link mechanism 62c, that is, the fifth link member 62c1 and the sixth link member 62c2. , The fourth axis, the fifth axis, and the sixth axis 62c3 restrict the movement of each component of the first link mechanism 62b to the left and right, and accordingly, to the left and right of the display monitor and the monitor mounting portion 62d. Movement is also restricted.

  As described above, the desk D according to the present embodiment has a keyboard arrangement for placing the keyboard on the top plate surface 3a of the first top plate 3 with a slope that descends toward the counter-use edge 3c. Since the area 3d is set, if the keyboard is arranged in the keyboard arrangement area 3d, the keyboard is positioned below the wrist, and therefore it is not necessary to fold the wrist upward when performing keyboard operation. Further, in this embodiment, a step is provided between the keyboard arrangement area 3d and the other area of the top surface 3a, and the upper surface of the keyboard when the keyboard is placed on the keyboard arrangement area 3d. Since the height position is lower than the height position of the upper surface when the keyboard is placed on the other area of the top surface 3a, the height of the wrist is also increased from this point. It is possible to prevent or suppress the folding back.

  Further, since a mouse arrangement area 3e having a gentler slope than that of the keyboard arrangement area 3d is provided on the side of the keyboard arrangement area 3d, the mouse arrangement area 3e is displayed when the mouse operation is performed in addition to the keyboard operation. If the mouse is arranged, it is difficult for the mouse to slide down from the first top plate 3, and the mouse can be stably placed on the top plate surface 3a of the first top plate 3.

  Further, an arm support area 3f is provided in front of both side end portions of the keyboard arrangement area 3d so as to protrude forward and have a gentler slope than the keyboard arrangement area 3d and on which a user's arm can be placed. Therefore, even when used with a chair that does not have an elbow rest, the user's arm can be placed on the arm support area 3f, and therefore the fatigue of the user's arm can be further reduced. . Further, when a user with short arms uses this desk D, the user's torso can be placed in the recess 3g between the left and right arm support areas 3f, 3f, and the keyboard can be operated without extending the arms. .

  In addition, a part of the top plate surface 4a of the second top plate 4 arranged above the first top plate 3 serves as a recording area 42a having an inclination rising toward the counter-use edge 4c. Therefore, when writing at a position on the side of the counter-use edge 4c of the paper document, it is not necessary to greatly extend the arm as compared to writing on a document on a conventional horizontal top plate. Therefore, it is possible to comfortably perform both work using an information terminal such as a personal computer and writing work on paper using such a desk D.

  Since the inclination of the bookkeeping area 42a can be changed, it is possible to select a usage mode according to the user's preference.

  The present invention is not limited to the embodiment described above.

  For example, the inclination of the keyboard arrangement area may be changeable so that a usage mode according to the user's preference can be selected.

  In addition, only one top plate is provided, and a part of the top plate surface of the top plate is used as a keyboard placement region, and another part of the top plate surface has a slope that rises toward the counter-use end side, Even if it is possible at least, the same effect can be obtained.

  On the other hand, in the above-described embodiment, a plurality of bookkeeping tables whose upper surface is a bookkeeping region may be provided, and the inclinations of the plurality of bookkeeping regions may be independently changed.

  Furthermore, you may make it provide the bookkeeping area | region which always makes a counter-use end side raise and incline in a part of 2nd top plate. In this case, the inclination angle may or may not be changeable.

  In addition, when it is known in advance that it is used together with the chair with the elbow, the arm support region and the concave portion on the use end side of the top plate may be omitted.

  Furthermore, the keyboard layout has an inclination that allows the counter-use end side of the top plate to be moved up and down, and the entire top plate surface is lowered toward the counter-use end side by lowering the counter-use end side of the top plate. It may be set in the area. In such a case, it is preferable that the entire top plate surface can be set to a bookkeeping area having an inclination rising toward the counter use end side by raising the counter use end side of the top plate.

  In addition, as shown in FIGS. 9 to 11, in the desk configured to support the first and second top plates A3 and A4 on the top plate support structure A2, one end is connected to the first top plate A3. In addition, the other end is connected to the second top plate A4, and a chain A51 that can be bent only on one side, and provided behind the chain A51, restricts the movement of the chain to the rear. You may form the top plate moving mechanism A5 which comprises the movement control part A52. The chain A51 is formed by connecting a plurality of chain elements A51a via a connecting shaft A51b, and can be bent only inward in FIGS. On the other hand, the movement restricting portion A52 is a semi-cylindrical member that opens to the front, and the chain A51 is transmitted when an operation force for pushing backward from the first or second top plate A3, A4 to the chain A51 is transmitted. The movement direction is guided and converted into an operation force that pushes forward the top plate to which the operation force is not applied. Although not shown, a retaining portion for restricting the forward movement of the chain A51 may be provided on the opposite side of the movement restricting portion A52 and the chain A51 using a pulley or the like. When such a retaining portion is provided, when an operation of pushing one of the first or second top plates backward toward the storage position is performed, the other is moved forward toward the use position. In addition, when an operation of pulling one of the first or second top plates forward toward the use position is added, the other top plate can be moved rearward toward the storage position.

  Furthermore, instead of the top plate moving mechanism 5 according to the above-described embodiment, a top plate moving mechanism B5 as described below may be adopted. As shown in FIGS. 12 and 13, the top plate moving mechanism B 5 includes a first rack gear B 51 provided on the first top plate 3 and a second rack gear B 52 provided on the second top plate 4. And a pinion gear B53 that simultaneously meshes with the first and second rack gears B51 and B52. More specifically, the first rack gear B51 is attached to the outer surface of the first top plate 3, and rack teeth are formed on the outer surface. The second rack gear B52 is attached to the lower surface of the second top plate 4 via a bracket B52a as a pair on the left and right sides, and rack teeth are formed on the inner surface. In this embodiment, the pinion gear B53 includes a first gear body B53a that meshes with the first rack gear B51, a second gear body B53b that meshes with the second rack gear B52, and the first and first gear bodies B53b. The second gear bodies B53a and B53b form a rotation center, and the shaft B53c connects the first and second gear bodies B53a and B53b.

  When the keyboard operation is finished and the writing operation is performed, each part of the top board moving mechanism B5 operates as follows. When an operation of pushing the first top plate 3 from the use position U to the storage position S is performed, the first top plate 3 is driven to the first gear body B53a of the pinion gear B53 via the first rack gear B51. The force is transmitted, and the second gear body B53b of the pinion gear B53 rotates in synchronization with the first gear body B53a. Then, a rotational force is transmitted from the second gear body B53b to the second rack gear B52, and this rotational force is converted into a driving force that drives the second top plate 4 to the use position U side. On the other hand, when an operation of pulling the second top plate 4 from the storage position S to the use position U is performed, the second gear body B53b of the pinion gear B53 from the second top plate 4 via the second rack gear 52 is performed. The driving force is transmitted to the first gear body B53a of the pinion gear B53 and rotates in synchronization with the second gear body B53b. Then, a rotational force is transmitted from the first gear body B53a to the first rack gear B51, and this rotational force is converted into a driving force that drives the first top plate 3 to the storage position S side. On the other hand, when the writing operation is finished and the keyboard is operated, an operation of pushing the second top 4 from the use position U to the storage position S or an operation of pulling the first top 3 from the storage position S to the use position U is performed. When performed, each part of the top plate moving mechanism B5 operates in the opposite direction to the above-described operation.

  In the above-described embodiment, the writing table lifting device is formed using the link mechanism 43, but the writing table lifting device may be formed using other means such as a gas spring.

  Other aspects such as adopting an aspect in which not only a desk but also a personal computer storage rack are configured in the same manner, and an aspect in which a display monitor is supported by a top support structure instead of a display arm being supported by a display arm, etc. Various changes may be made without departing from the scope.

The perspective view which shows the desk which concerns on one Embodiment of this invention. The side view which shows the desk which concerns on the same embodiment. The front view which shows the desk which concerns on the same embodiment. The top view which shows the desk which concerns on the same embodiment. The side view which shows the 1st top plate of the desk which concerns on the same embodiment. The center side sectional view showing the 2nd top plate of the desk concerning the embodiment. The expansion perspective view of the principal part of the desk concerning the embodiment. The enlarged front view of the principal part of the desk which concerns on the same embodiment. The perspective view which shows the principal part of the desk which concerns on other embodiment of this invention. The figure which shows the action | operation of the desk which concerns on the same embodiment. The figure which further expands and shows the principal part in FIG. The expansion perspective view of the principal part of the desk concerning other embodiments of the present invention. The enlarged front view of the principal part of the desk which concerns on the same embodiment.

Explanation of symbols

D ... desk 3 ... first top plate 3a ... top plate surface 3d ... keyboard placement region 3e ... mouse placement region 3f ... arm support region 4 ... second top plate 4a ... top plate surface 42a ... bookkeeping region

Claims (8)

  A furniture with a top plate, characterized in that at least part or all of the top plate surface can be used as a keyboard placement area for placing a keyboard, and has a slope that descends toward the opposite end.   The top plate according to claim 1, wherein a step is provided between the keyboard placement region and another region of the top plate surface so that the keyboard placement region is positioned below the other region of the top plate surface. With furniture.   3. A part of the top plate surface is used as the keyboard arrangement area, and a mouse arrangement area having a gentler slope than the keyboard arrangement area is provided at a side of the keyboard arrangement area. Furniture with a top plate as described.   2. An arm support area that protrudes forward in front of both end portions of the keyboard arrangement area and has a gentler slope than the keyboard arrangement area and on which a user's arm can be placed. Furniture with a top plate as described in 2 or 3.   The furniture with a top plate according to claim 1, 2, 3, or 4, wherein the inclination of the keyboard arrangement area can be changed.   A first top plate having the keyboard arrangement area; and a second top plate disposed above the first top plate, wherein a part or all of the second top plate is re-used The furniture with a top plate according to claim 1, 2, 3, 4 or 5, wherein the end side is a book-keeping region that is inclined upward.   The furniture with a top plate according to claim 1, 2, 3, 4, or 5, wherein at least a part or all of the top plate surface can be a recording area having an inclination rising toward the counter-use end side.   The furniture with a top plate according to claim 6 or 7, wherein the inclination of the bookkeeping area can be changed.

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